Rotary engine and pump



Aug. 7, 1934- J. WILLIAMS ET AL 1,969,192

ROTARY ENGINE AND PUMP Filed Sept. 27. 1932 3 Sheets-Sheet l A1181 1934- J. WILLIAMS ET AL 1,969,192

ROTARY ENGINE AND PUMP Filed Sept. 27. 1932 3 Sheets-Sheet 2 Aug. 7, 1934.

J. WILLIAMS El AL ROTARY ENGINE AND PUMP 'F iled Sept. 27. 1932 3 Sheets-Sheet 3 ,vll'a s Patented Aug. 7, 1934 UNITED STATES PATENT] OFFICE ROTARY ENGINE AND PUMP Joseph Williams and Joseph Robert 'llroughear, Auckland, New Zealand, assignors to Maximum Pumps and Engines Limited, Auckland, New

Zealand Application September 27,1932, Serial No. 635,094

In New Zealand October 1'7, 1931 3 Claims.

This invention relates to rotary engines and pumps, and provides an improved form thereof, adaptable for use either as a driven pump, or as a motor for generating power.

- The improved form of engine or pump is characterized by'the mounting of a rotor eccentrically within the cylindrical bore of a rotary casing and in contact therewith, the rotor and the casing being rotatable together in the same direction.

Constructionally, the improved engine or pump comprises a rotary casing containing a cylindrical bore and with end plates or covers attached, supported by aligned bearings, a rotor mounted eccentrically in said bore and in contact with is the casing, and a plate extending the full length of the bore attached to the casing between the inlet and outlet ports therein, and slidable in the rotor.

The invention will, however, be more fully described with the aid of the accompanying drawings, wherein Fig. 1 is a longitudinal sectional elevation, of a pump constructed according to the invention,

Fig. 2 a cross sectional elevation taken through AA, Fig. 1,

Fig. 3 an elevation of the end plate or cover.

at the driving end of the pump,

Fig. 4 across sectional elevation on the line B-B, Fig. 3, 1

Fig.5 a plan'view of the rotary casing,

Fig. 6 a part sectional view on the line C-C, i V

Fig. '7 a part sectional view on the line D-D, Fig. 5, A Figs. 8, 9 and. 10 diagrammatic views illustratcylindrical bore 2 and fitted with end plates or,

covers 3 and 4, (Figs. 1, 2, 3 and-4). The end plate or cover 3 is the driving plate or cover, and is formed with a boss 3 adapted to be keyed on the end of a hollow-shaft 5 (Fig. 1) mounted in pedestal bearings 6 on a base '7, said shaft 5 also having fast and loose pulleys 8, 8 respectively, thereon.

The driving end plate or cover 3 is further secured to the hollow shaft 5 by a set screw 9 in the boss 3 and also contains a chamber 10 open to theinterior of the hollow shaft 5, and also in communication with the interior'of the'casing'l through a horizontal port 11 and radial ports 12 in the wall of the latter, (Figs. 2, 5 and 7) Y The end plate or cover 4 at the opposite end' of the casing 1, contains a circular opening 18 around which is a ring 14, the latter entering a ring 15 fitted to or forming part of a pedestal bearing 16, and thereby rotatably supporting the casing 1 at its end distant from the hollowjshaft 5, packing 16 being provided between said rings 14, 15 to prevent leakage.

The rotor 17 (Figs. 1 and 2), is cylindrical and is mounted eccentrically Within the cylindrical bore2 of the rotary ca'sing'l by being supported on a stationary shaft 18 out of alignment with the hollow shaft 5 said shaft 18 being mounted at one end in the pedestal bearing 16 and passing through the opening'13 in the end plate or cover 4, and being supported at its other end by having an onset portion 18 entered in a bearing 19 fitted in the end plate or cover 3 in alignment with the shaft 5, said end plate or cover 3 turningabout said offset portion 18 Thepedestal bearing 16 contains a chamber 16 provided with an outlet 20, said'chamber 16 also being connected through the circular open' ing 13 in the end plate or cover 4 with a space 21' in the rotary casing 1 between said plate or cover 4 on the one side and the closed end of the rotor 17 and a flanged ring 22 on the other side, said ring 22 being slidaole on studs 23 in the end plate or cover 4 and being kept forced away from same by springs 24 around said studs and in compres. sion between said plate 4 and ring 22. s

The action of the springs 24 on the ring 22, presses the latter against the rotor 1'7,'which is thereby forced along the shaft 18 towards the end plate or cover 3, between which and the rotor 17, a plain friction ring 25 is placed.

The space 21 in the rotary casing 1 is connected by a port 26 in the casing Wall with a longitudinal port 27 also in said wall and from which ports 28 open into the interior of the casing (Figs. 2, 5 and 6).

The ports 28 on the one hand; and the ports 12 on the otherhand,- are separated by a plate 29 (Figs. 2 and 5) which extends along the full length of the rotor and has an enlarged rounded edge 29 inserted in" a correspondingly shapedgroove 3Jcut along the inner surface of the easing 1, so that said plate 29 is attached to the is I ' and the casing 1 (Fig. 8) commences to open up,

latter, and extends into a radial slot 31 formed in the rotor 17.

The periphery of the rotor 1'7 is further grooved or recessed lengthways to take a series of spaced parallel metal strips 32 (Figs. 1 and 2) the outer edges of which are shaped to fit against the inner surface of the casing 1, said strips 32'being retained on the rotor 17 by split rings 33 sprung into recesses in their ends, while springs 34 in compression behind said strips 32 tend to force them outwards and into contact with the inter nal surface of the casing 1, when required.

The rotor 17 is counterweighted at'35 directly opposite the plate 29, to obtain the desired balance. Lubrication of the rotor 17 on its shaft 18 is provided for by passages 36 in the latter, supplied with lubricant through] the pedestal bear-.

ing 16.

With the shaft 5 V pulley 8 from any suitable prime mover, the casing landrotor 17 are rotated together, the connecting means between said casing and rotor being the plate 29, the casing 1 in eflecttrolling aroundv on the rotor 17,, between which and the plate 29, sliding movement takes place at the connectedportions of the rotor and casing, due to difference in location of the centres thereof. If, therefore, the hollow shaft 5 be connected with fluid to be pumped, and the casing 1 and rotor-1'7, rotated in the direction indicated by the arrows, the action will be as follows:-

It will be noted that the ports 12 (inlet ports) and the ports 28. (outlet ports) are at all times separated by the plate 29, and that the rotor 17 is always in contact with the interior of the casing 1 along a horizontal line at the highest point h (Figs. 8, 9, 10) of the latter, but upon the casing 1 and rotor 1'? being rotated in the directionindicated, it will be found'that as the plate 29 travels awayv from said highest point it, a space a bounded by said plate 29, the rotor 17 and said space a by its expansion is responsible for fluid being drawn in through theports 1 2, port 11, chamber 10 and shaft 5, to behind the plate 29, as indicated in Figs. 8 and 9. I

This drawing of fluid into the space a be-. tween the rotor 17 and the casing 1 behind the plate 29 continues until such time as the inlet ports 12 again pass the point h when; the drawn influid becomes separated from the inlet ports 12, by said point 71. (Fig. 19), the rotor 17, casing 1,.and plate 29' by the continued rotation of the rotor and the casing, thenproceeding to draw in a fresh supply of fluid through the ports 12,'which fluid is however kept apart or is separated from the previously drawn in fluid, by the point h. The plate 29 is now behind the previouslydrawn in fluid (Fig. 10), said fluid owing to its being contained in a space which decreases 'as the plate 29 moves towards the point h, is expelled by said plate through the ports 28, and ultimately discharged from the pump via the ports 27 and 26, space 21 openings 13,- pedestal bearing 16- and pipe 20.

Continued rotation of the casing 1 and rotor 17 is responsible for a continuous drawing, in of fluid through the ports 12 to behind the plate that ultimately it is cut off fromthe suction side of the plate 29, and becomes subjected to the pressure side of the latter, to-be finally expelled through the ports 28, while a further charge of being driven through the fast fluid is being dealt with by the suction side of said plate 29.

The construction when used as an external combustion motor, operates in a similar manner to the pump, but is duplicated toprovide for compression of the; charge to be fired, before passing thelatter to'a combustion chamber from which after ignition of the charge the resultant gases are permitted to expand between a rotor and the casing, in order to impart rotary m0- tionto same.

Upon referring to Figs. 11, 12 and 13 of the drawings, it willbe seen that the rotary casing 1 is divided :by a-partition 36 into two side by side chambers 39, v40, each of which contains a rotor 1'7 constructed and operated and connectedwith the casing 1 by plates 29, the same as before described, except that they are mounted to rotateon a cranked portion 3'7 of a stationary shaft 3'7 fixed in pedestals 38, and on the aligned Chamber 39 functionsas the fuel compressor,

a charge of fuel mixture being drawn from a carburettor (not shown) through an intake 41 into a circular recess 12 in a non-rotary casting 43 on one end of the shaft 37, saidcasting 43 being pressed by springs 44 acting against the adjacent pedestal 38,. so that the recess 42 registers with a similar recess 45 inc. boss 45 on the end or cover plate 46, a port 47 in which connects the recess 45? with a port 48 in the casing Wall, a further port 19 inthe latter connecting the port 48 with the-interior-of the chamber 39 at one side of the plate 29. w 4

The charge drawn intothe compressor chamber 39 is compressed andfinally passed to the ports 50, 51, 52, (Fig. 12), and after forcingopen: the spring loaded check valve 53- enters the combustion chamber 54 on the outside of the casing 1, where at the appropriate moment it is fired by means of aspark plug 55;. I 4

From the cornbustion chamber 54, the ignited charge is admitted by a cam operated andspring loaded valve 56 to a port 57 which -passes the gases into the chamber 40 behindjthe plate 29 so that said gases expanding in .the chamber 40 between the rotor .1'Zand the casing 1, impart turning motion to the whole construction in the direction indicated by the arrows, the expanded gases being later separatedby the point of contact of the rotor 17 with the casing 1 from the following incoming gases and expelled through the ports 58, 59 and 60 and circular recesses 61, 62, to the exhaust port 63. I s The circular recesses 61, 62 are arranged-to co-act in asimilar'manner to the circular recesses 42, 45 the casting containing the recess- 62 being water jacketed and heldagainst rotarymovement on an extension 64 of the end or cover plate 64 which is adapted to drive a shaft 65- through toothed gearing 66. l

Also the rocker arm 67 for opening thevalve 56 against the actionof its spring, and which is mounted on the endor cover plate 64 and travels with the latter, is actuated to operate said valve. 56 at the appropriate moment by its end carrying the friction ;roller 68 travelling-around a cam- 69 on the non-rotarycasting containing the ,cir-. cular recess 62., v

What we do claim anddesire tov obtain by Let: ters Patent of theUnitedStatesof Americaisz- 1. A- rotary pump comprising a rotary casing including a cylindrical bodyhaving inlet and outletports therein, exterior chambers on the body respectively enclosing said inlet and outlet ports, end covering plates attached to the respective ends of the body and respectively provided with ports leading to the inlet chamber and from the outlet chamber, aligned bearings supporting said end plates, a rotor mounted eccentrically in the body and in contact with the inner surface thereof, a plate extending the full length of said chambers and attached thereto between the inlet and outlet ports and slidable radially in said rotor, a plurality of pedestals, a hollow shaft in one of said pedestals and acting to support the bearing of one end plate, the other bearing being in the form of a ring supported by another of the pedestals, said latter pedestal being hollow and constituting a discharge outlet, and the ring serving to establish communication between the port in the adjacent end plate and the hollow pedestal.

2. A rotary pump as claimed in claim 1, wherein the end plate supported by the hollow shaft is provided on its inner surface with a central bearing, and wherein a shaft is provided for loosely supporting the rotor and includes an offset end porsurface, and wherein a shaft is provided for the rotor for loosely supporting the rotor and includes an offset end portion journalled in the said central bearing, the other end of said shaft passing through the ring bearing and being journalled in the upper end of the hollow pedestal so as to support the rotor eccentrically of the casing, -a ring adjacent the end plate having a discharge port, means slidably and yieldably mounted on said ring in spaced relation to the said end plate and in contact with one end of the rotor, said ring cooperating with the end plate and form-.

ing part of the discharge outlet.

JOSEPH WILLIAMSJ JOSEPH R. TROUGHEAR. 

